fix: move HP_SHARED_KEY validation after strip_quotes and stop rejecting apostrophes

Signed-off-by: Oleksander Piskun <oleksandr2088@icloud.com>

Author: oleksandr-nc

start.sh

@@ -123,23 +123,23 @@ if [ "$NON_ASCII_COUNT" -gt 0 ]; then
     exit 1
 fi
 
-# Reject characters that break the generated FRP TOML config or get mangled by
-# strip_quotes:
-#   "  - terminates the TOML basic string used for metadatas.token
+# Strip surrounding quotes if user accidentally included them in env vars
+HP_SHARED_KEY="$(strip_quotes "$HP_SHARED_KEY")"
+export HP_SHARED_KEY
+
+# After stripping any surrounding quotes, the remaining value must not contain
+# characters that would corrupt the generated FRP TOML config line
+# `metadatas.token = "..."`:
+#   "  - terminates the TOML basic string
 #   \  - starts a TOML escape sequence inside that string
-#   '  - silently stripped from the end of the value by strip_quotes() below
-FORBIDDEN_COUNT=$(printf '%s' "$HP_SHARED_KEY" | LC_ALL=C tr -cd "\"\\\\'" | wc -c)
+FORBIDDEN_COUNT=$(printf '%s' "$HP_SHARED_KEY" | LC_ALL=C tr -cd '"\\' | wc -c)
 if [ "$FORBIDDEN_COUNT" -gt 0 ]; then
     echo "ERROR: HP_SHARED_KEY contains a forbidden character."
-    echo "The following characters are not allowed: double quote (\"), single quote ('), backslash (\\)."
+    echo "The following characters are not allowed: double quote (\"), backslash (\\)."
     echo "Please choose a password without these characters."
     exit 1
 fi
 
-# Strip surrounding quotes if user accidentally included them in env vars
-HP_SHARED_KEY="$(strip_quotes "$HP_SHARED_KEY")"
-export HP_SHARED_KEY
-
 # Strip surrounding quotes from other commonly affected environment variables
 NC_INSTANCE_URL="$(strip_quotes "$NC_INSTANCE_URL")"
 HP_FRP_ADDRESS="$(strip_quotes "$HP_FRP_ADDRESS")"